/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1A1F2B;
            --color-brand: #4CAF7C;
            --color-accent: #F97316;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-text-heading: #1F2937;
            --color-text-body: #374151;
            --color-text-muted: #6B7280;
            --color-text-placeholder: #9CA3AF;
            --color-border: #D1D5DB;
            --color-nav-bg: #1A1F2B;
            --color-nav-text: #E8ECF1;
            --color-nav-hover: #2C3344;
            --color-nav-active: #4CAF7C;
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 12px 28px rgba(0, 0, 0, 0.12);
            --shadow-button: 0 8px 20px rgba(76, 175, 124, 0.4);
            --radius-sm: 4px;
            --radius-md: 8px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --spacing-section: 80px;
            --spacing-section-mobile: 48px;
            --nav-width: 240px;
            --content-padding: 40px;
            --container-max: 1280px;
            --transition-base: 0.2s ease;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-base);
            font-size: 16px;
            line-height: 1.75;
            color: var(--color-text-body);
            background: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--color-brand);
            text-decoration: none;
            transition: color var(--transition-base);
        }
        a:hover {
            color: #3d9c6a;
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }

        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--color-brand);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--content-padding);
        }

        .container-fluid {
            width: 100%;
            padding: 0 var(--content-padding);
        }

        /* ===== 左侧导航（桌面） ===== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--nav-width);
            height: 100vh;
            background: var(--color-nav-bg);
            z-index: 1100;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
            transition: transform var(--transition-base);
        }

        .side-nav .brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 20px 24px;
            height: 80px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }

        .side-nav .brand .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-brand);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            flex-shrink: 0;
        }

        .side-nav .brand .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .side-nav .nav-list {
            flex: 1;
            padding: 16px 0;
        }

        .side-nav .nav-list li {
            margin: 2px 0;
        }

        .side-nav .nav-list a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 24px;
            font-size: 14px;
            font-weight: 500;
            color: var(--color-nav-text);
            border-left: 4px solid transparent;
            transition: background var(--transition-base), border-color var(--transition-base);
            text-decoration: none;
        }

        .side-nav .nav-list a i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--color-text-placeholder);
            transition: color var(--transition-base);
        }

        .side-nav .nav-list a:hover {
            background: var(--color-nav-hover);
            border-left-color: var(--color-brand);
            text-decoration: none;
        }

        .side-nav .nav-list a:hover i {
            color: var(--color-nav-text);
        }

        .side-nav .nav-list a.active {
            background: rgba(76, 175, 124, 0.1);
            border-left-color: var(--color-brand);
            color: #fff;
        }

        .side-nav .nav-list a.active i {
            color: var(--color-brand);
        }

        .side-nav .nav-footer {
            padding: 16px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 12px;
            color: var(--color-text-placeholder);
            flex-shrink: 0;
        }

        .side-nav .nav-footer p {
            margin: 0;
            line-height: 1.6;
        }

        /* ===== 顶部导航（移动端） ===== */
        .top-bar-mobile {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 56px;
            background: var(--color-nav-bg);
            z-index: 1200;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }

        .top-bar-mobile .hamburger {
            background: none;
            border: none;
            width: 40px;
            height: 40px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            cursor: pointer;
            padding: 0;
            border-radius: var(--radius-sm);
        }

        .top-bar-mobile .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-nav-text);
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .top-bar-mobile .hamburger:hover span {
            background: var(--color-brand);
        }

        .top-bar-mobile .mobile-logo {
            font-size: 17px;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.3px;
        }

        .top-bar-mobile .mobile-spacer {
            width: 40px;
        }

        /* 移动端下拉菜单 */
        .mobile-menu-overlay {
            display: none;
            position: fixed;
            top: 56px;
            left: 0;
            width: 100%;
            height: calc(100vh - 56px);
            background: rgba(26, 31, 43, 0.97);
            z-index: 1150;
            flex-direction: column;
            padding: 24px 16px;
            overflow-y: auto;
        }

        .mobile-menu-overlay.open {
            display: flex;
        }

        .mobile-menu-overlay a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 14px 16px;
            font-size: 18px;
            font-weight: 500;
            color: var(--color-nav-text);
            border-left: 4px solid transparent;
            text-decoration: none;
            transition: background var(--transition-base), border-color var(--transition-base);
            line-height: 1.4;
        }

        .mobile-menu-overlay a i {
            width: 24px;
            text-align: center;
            color: var(--color-text-placeholder);
        }

        .mobile-menu-overlay a:hover {
            background: var(--color-nav-hover);
            border-left-color: var(--color-brand);
        }

        .mobile-menu-overlay a.active {
            border-left-color: var(--color-brand);
            color: #fff;
        }

        .mobile-menu-overlay .mobile-menu-footer {
            margin-top: 32px;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 13px;
            color: var(--color-text-placeholder);
            text-align: center;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: var(--nav-width);
            min-height: 100vh;
        }

        .main-content {
            padding: 0;
        }

        /* ===== 倒计时条 ===== */
        .countdown-bar {
            position: sticky;
            top: 0;
            z-index: 1050;
            width: 100%;
            height: 48px;
            background: var(--color-accent);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 20px;
            gap: 12px;
            color: #fff;
            font-size: 14px;
            line-height: 18px;
            font-weight: 500;
            flex-wrap: wrap;
        }

        .countdown-bar .countdown-label {
            white-space: nowrap;
        }

        .countdown-bar .countdown-timer {
            font-family: 'Inter', 'Courier New', monospace;
            font-weight: 600;
            letter-spacing: 1px;
            background: rgba(255, 255, 255, 0.15);
            padding: 4px 12px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            white-space: nowrap;
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            height: 80vh;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1;
        }

        .hero .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            padding: 0 20px;
            max-width: 800px;
            width: 100%;
        }

        .hero h1 {
            font-size: 48px;
            line-height: 1.2;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }

        .hero .hero-sub {
            font-size: 20px;
            line-height: 1.5;
            font-weight: 400;
            color: #D1D5DB;
            margin-bottom: 32px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero .hero-actions .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 40px;
            background: var(--color-brand);
            color: #fff;
            font-size: 18px;
            font-weight: 600;
            border-radius: var(--radius-md);
            text-decoration: none;
            transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
            box-shadow: 0 4px 12px rgba(76, 175, 124, 0.3);
            border: none;
            cursor: pointer;
        }

        .hero .hero-actions .btn-primary:hover {
            background: #3d9c6a;
            box-shadow: var(--shadow-button);
            transform: translateY(-2px);
            text-decoration: none;
            color: #fff;
        }

        .hero .hero-actions .btn-primary:active {
            transform: translateY(0);
        }

        .hero .hero-actions .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            border-radius: var(--radius-md);
            text-decoration: none;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: background var(--transition-base), border-color var(--transition-base);
            cursor: pointer;
        }

        .hero .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            color: #fff;
        }

        .hero .hero-link {
            display: block;
            margin-top: 20px;
            font-size: 14px;
            color: #9CA3AF;
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .hero .hero-link:hover {
            color: #fff;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-alt {
            background: var(--color-card);
        }

        .section-title {
            font-size: 32px;
            line-height: 1.25;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            text-align: center;
        }

        .section-subtitle {
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text-muted);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 40px;
        }

        /* ===== 亮点图墙 ===== */
        .feature-grid .card {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            border: none;
            height: 100%;
        }

        .feature-grid .card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .feature-grid .card-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: #E5E7EB;
        }

        .feature-grid .card-image-placeholder {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: #E5E7EB;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--color-text-placeholder);
            font-weight: 600;
        }

        .feature-grid .card-section {
            padding: 24px;
        }

        .feature-grid .card-section h3 {
            font-size: 20px;
            line-height: 1.3;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 8px;
        }

        .feature-grid .card-section p {
            font-size: 14px;
            line-height: 1.6;
            color: var(--color-text-muted);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            background: var(--color-bg);
            padding: 80px 20px;
            text-align: center;
        }

        .cta-section h2 {
            font-size: 36px;
            line-height: 1.2;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 16px;
            color: var(--color-text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }

        .cta-section .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .cta-section .btn-cta-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 16px 40px;
            background: var(--color-brand);
            color: #fff;
            font-size: 18px;
            font-weight: 600;
            border-radius: var(--radius-md);
            text-decoration: none;
            transition: background var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base);
            box-shadow: 0 4px 12px rgba(76, 175, 124, 0.3);
            border: none;
            cursor: pointer;
        }

        .cta-section .btn-cta-primary:hover {
            background: #3d9c6a;
            box-shadow: var(--shadow-button);
            transform: translateY(-2px);
            text-decoration: none;
            color: #fff;
        }

        .cta-section .btn-cta-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--color-brand);
            font-size: 16px;
            font-weight: 600;
            border-radius: var(--radius-md);
            text-decoration: none;
            border: 2px solid var(--color-brand);
            transition: background var(--transition-base), color var(--transition-base);
            cursor: pointer;
        }

        .cta-section .btn-cta-secondary:hover {
            background: rgba(76, 175, 124, 0.08);
            text-decoration: none;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--color-card);
        }

        .faq-section .section-title {
            margin-bottom: 32px;
        }

        .accordion .accordion-item {
            border: 1px solid #E5E7EB;
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--color-card);
        }

        .accordion .accordion-title {
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text-heading);
            padding: 16px 24px;
            background: var(--color-card);
            border: none;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
            text-align: left;
            transition: background var(--transition-base);
            line-height: 1.4;
        }

        .accordion .accordion-title:hover {
            background: #F9FAFB;
        }

        .accordion .accordion-title::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 16px;
            color: var(--color-text-placeholder);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }

        .accordion .accordion-item.is-active .accordion-title::after {
            transform: rotate(180deg);
        }

        .accordion .accordion-content {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.8;
            color: var(--color-text-muted);
            border-top: 1px solid #F3F4F6;
        }

        .faq-more {
            text-align: center;
            margin-top: 24px;
            font-size: 14px;
        }

        .faq-more a {
            color: var(--color-brand);
            font-weight: 500;
        }

        /* ===== 最新资讯 ===== */
        .news-section {
            padding: var(--spacing-section) 0;
            background: var(--color-bg);
        }

        .news-section .section-title {
            margin-bottom: 32px;
        }

        .news-card {
            background: var(--color-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .news-card .news-image {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
            background: #E5E7EB;
        }

        .news-card .news-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card .news-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
            flex-wrap: wrap;
        }

        .news-card .news-category {
            display: inline-block;
            padding: 2px 10px;
            background: #E5E7EB;
            color: #4B5563;
            font-size: 12px;
            font-weight: 500;
            border-radius: var(--radius-sm);
            line-height: 1.6;
        }

        .news-card .news-date {
            font-size: 12px;
            color: var(--color-text-placeholder);
        }

        .news-card h4 {
            font-size: 16px;
            line-height: 1.4;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card .news-summary {
            font-size: 14px;
            line-height: 1.6;
            color: var(--color-text-muted);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }

        .news-card .news-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--color-brand);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            text-decoration: none;
            margin-top: auto;
        }

        .news-card .news-link:hover {
            text-decoration: underline;
        }

        .news-card .news-link i {
            font-size: 12px;
            transition: transform var(--transition-base);
        }

        .news-card .news-link:hover i {
            transform: translateX(4px);
        }

        /* 空态 */
        .news-empty {
            height: 120px;
            border: 2px dashed #D1D5DB;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--color-text-placeholder);
            background: var(--color-card);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--color-primary);
            padding: 48px 0 32px;
            color: var(--color-text-placeholder);
        }

        .site-footer .footer-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--content-padding);
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .site-footer .footer-brand .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand .logo-text .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--color-brand);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
            color: #fff;
        }

        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.6;
            color: var(--color-text-placeholder);
            max-width: 360px;
        }

        .site-footer .footer-col h5 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 12px;
        }

        .site-footer .footer-col ul li {
            margin-bottom: 6px;
        }

        .site-footer .footer-col ul li a {
            font-size: 13px;
            color: var(--color-text-placeholder);
            text-decoration: none;
            transition: color var(--transition-base);
        }

        .site-footer .footer-col ul li a:hover {
            color: var(--color-brand);
            text-decoration: none;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 12px;
            color: var(--color-text-placeholder);
        }

        /* ===== 响应式 ===== */

        /* 平板 768～1023px */
        @media (max-width: 1023px) {
            .side-nav {
                display: none;
            }

            .top-bar-mobile {
                display: flex;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: 56px;
            }

            .main-content {
                padding: 0;
            }

            :root {
                --content-padding: 24px;
                --spacing-section: 56px;
            }

            .hero {
                height: 70vh;
                min-height: 500px;
            }

            .hero h1 {
                font-size: 38px;
                line-height: 1.2;
            }

            .hero .hero-sub {
                font-size: 18px;
            }

            .section-title {
                font-size: 28px;
            }

            .cta-section h2 {
                font-size: 30px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        /* 手机 ≤767px */
        @media (max-width: 767px) {
            :root {
                --content-padding: 16px;
                --spacing-section: 48px;
                --spacing-section-mobile: 32px;
            }

            .top-bar-mobile {
                height: 56px;
                padding: 0 12px;
            }

            .top-bar-mobile .mobile-logo {
                font-size: 16px;
            }

            .countdown-bar {
                height: 40px;
                font-size: 12px;
                gap: 6px;
                padding: 0 12px;
                flex-wrap: nowrap;
            }

            .countdown-bar .countdown-timer {
                font-size: 11px;
                padding: 2px 8px;
                letter-spacing: 0.5px;
            }

            .hero {
                height: 60vh;
                min-height: 420px;
            }

            .hero h1 {
                font-size: 28px;
                line-height: 1.3;
            }

            .hero .hero-sub {
                font-size: 16px;
                line-height: 1.5;
                margin-bottom: 24px;
            }

            .hero .hero-actions {
                flex-direction: column;
                width: 100%;
            }

            .hero .hero-actions .btn-primary,
            .hero .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
                text-align: center;
            }

            .hero .hero-actions .btn-primary {
                padding: 14px 24px;
                font-size: 16px;
            }

            .hero .hero-actions .btn-secondary {
                padding: 12px 24px;
                font-size: 15px;
            }

            .section-title {
                font-size: 24px;
                line-height: 1.3;
            }

            .section-subtitle {
                font-size: 14px;
                margin-bottom: 24px;
            }

            .feature-grid .card-section {
                padding: 16px;
            }

            .feature-grid .card-section h3 {
                font-size: 18px;
            }

            .cta-section {
                padding: 48px 16px;
            }

            .cta-section h2 {
                font-size: 24px;
                line-height: 1.3;
            }

            .cta-section .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .cta-section .btn-cta-primary,
            .cta-section .btn-cta-secondary {
                width: 100%;
                justify-content: center;
                text-align: center;
            }

            .cta-section .btn-cta-primary {
                padding: 14px 24px;
                font-size: 16px;
            }

            .cta-section .btn-cta-secondary {
                padding: 12px 24px;
                font-size: 15px;
            }

            .news-card .news-body {
                padding: 16px 16px 20px;
            }

            .accordion .accordion-title {
                font-size: 15px;
                padding: 14px 16px;
            }

            .accordion .accordion-content {
                padding: 0 16px 16px;
                font-size: 13px;
            }

            .site-footer {
                padding: 32px 0 24px;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .site-footer .footer-brand .logo-text {
                font-size: 18px;
            }

            .site-footer .footer-brand p {
                font-size: 13px;
            }

            .section {
                padding: var(--spacing-section-mobile) 0;
            }

            .faq-section {
                padding: var(--spacing-section-mobile) 0;
            }

            .news-section {
                padding: var(--spacing-section-mobile) 0;
            }
        }

        /* 小手机 ≤480px */
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 24px;
            }

            .hero .hero-sub {
                font-size: 14px;
            }

            .countdown-bar {
                font-size: 11px;
                height: 36px;
            }

            .countdown-bar .countdown-timer {
                font-size: 10px;
                padding: 2px 6px;
            }

            .section-title {
                font-size: 22px;
            }

            .cta-section h2 {
                font-size: 22px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }

        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .mt-4 {
            margin-top: 32px;
        }
        .mb-1 {
            margin-bottom: 8px;
        }
        .mb-2 {
            margin-bottom: 16px;
        }
        .mb-3 {
            margin-bottom: 24px;
        }
        .mb-4 {
            margin-bottom: 32px;
        }

        .grid-x.grid-padding-x>.cell {
            padding-left: 12px;
            padding-right: 12px;
        }

        /* 确保 Foundation 网格间距一致 */
        .grid-padding-x {
            margin-left: -12px;
            margin-right: -12px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --color-primary: #1A1F2B;
        --color-secondary: #4CAF7C;
        --color-accent: #F97316;
        --color-bg: #F8FAFC;
        --color-card: #FFFFFF;
        --color-text-heading: #1F2937;
        --color-text-body: #374151;
        --color-text-muted: #6B7280;
        --color-text-placeholder: #9CA3AF;
        --color-border: #E5E7EB;
        --color-nav-hover: #2C3344;
        --color-nav-active: #4CAF7C;
        --font-base: 'Inter', 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
        --shadow-card: 0 4px 12px rgba(0,0,0,0.06);
        --shadow-card-hover: 0 12px 28px rgba(0,0,0,0.12);
        --shadow-btn: 0 8px 20px rgba(76,175,124,0.4);
        --radius-sm: 4px;
        --radius-md: 8px;
        --radius-lg: 16px;
        --transition: 0.2s ease;
        --nav-width: 240px;
        --content-max: 1280px;
        --article-max: 780px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-base);
        font-size: 16px;
        line-height: 1.6;
        color: var(--color-text-body);
        background: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        padding-left: var(--nav-width);
        min-height: 100vh;
    }
    a { color: var(--color-secondary); text-decoration: none; transition: var(--transition); }
    a:hover, a:focus { text-decoration: underline; }
    a:focus-visible { outline: 2px solid var(--color-secondary); outline-offset: 2px; }
    img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { color: var(--color-text-heading); font-weight: 700; line-height: 1.3; }
    p { margin-bottom: 1rem; }
    .container { max-width: var(--content-max); margin: 0 auto; padding: 0 40px; }

    /* ===== Left Side Navigation (Desktop) ===== */
    .side-nav {
        position: fixed;
        top: 0;
        left: 0;
        width: var(--nav-width);
        height: 100vh;
        background: var(--color-primary);
        display: flex;
        flex-direction: column;
        z-index: 1000;
        overflow-y: auto;
        transition: var(--transition);
    }
    .side-nav .brand {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 20px 24px;
        height: 80px;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        flex-shrink: 0;
    }
    .side-nav .brand .logo-icon {
        width: 36px;
        height: 36px;
        background: var(--color-secondary);
        border-radius: var(--radius-md);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 700;
        font-size: 16px;
        flex-shrink: 0;
    }
    .side-nav .brand .logo-text {
        font-size: 18px;
        font-weight: 700;
        color: #E8ECF1;
        letter-spacing: 0.5px;
    }
    .side-nav .nav-list {
        flex: 1;
        padding: 16px 0;
    }
    .side-nav .nav-list li a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 24px;
        font-size: 14px;
        font-weight: 500;
        color: #E8ECF1;
        transition: var(--transition);
        border-left: 4px solid transparent;
        text-decoration: none;
    }
    .side-nav .nav-list li a:hover,
    .side-nav .nav-list li a:focus {
        background: var(--color-nav-hover);
        border-left-color: var(--color-secondary);
        text-decoration: none;
    }
    .side-nav .nav-list li a.active {
        background: var(--color-nav-hover);
        border-left-color: var(--color-secondary);
        color: #fff;
        font-weight: 600;
    }
    .side-nav .nav-list li a i {
        width: 20px;
        text-align: center;
        font-size: 16px;
        color: #9CA3AF;
    }
    .side-nav .nav-list li a.active i { color: var(--color-secondary); }
    .side-nav .nav-footer {
        padding: 16px 24px;
        border-top: 1px solid rgba(255,255,255,0.06);
        flex-shrink: 0;
    }
    .side-nav .nav-footer p {
        font-size: 12px;
        color: #6B7280;
        margin-bottom: 4px;
        line-height: 1.5;
    }

    /* ===== Mobile Top Bar ===== */
    .mobile-topbar {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 56px;
        background: var(--color-primary);
        z-index: 1100;
        align-items: center;
        justify-content: space-between;
        padding: 0 16px;
    }
    .mobile-topbar .hamburger {
        background: none;
        border: none;
        color: #E8ECF1;
        font-size: 24px;
        cursor: pointer;
        padding: 8px;
        border-radius: var(--radius-sm);
        transition: var(--transition);
    }
    .mobile-topbar .hamburger:hover, .mobile-topbar .hamburger:focus {
        background: var(--color-nav-hover);
    }
    .mobile-topbar .mobile-brand {
        display: flex;
        align-items: center;
        gap: 8px;
        color: #E8ECF1;
        font-weight: 700;
        font-size: 16px;
    }
    .mobile-topbar .mobile-brand .logo-icon {
        width: 28px;
        height: 28px;
        background: var(--color-secondary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 700;
        font-size: 12px;
    }
    .mobile-topbar .mobile-cta a {
        color: var(--color-secondary);
        font-size: 13px;
        font-weight: 600;
        padding: 6px 14px;
        border: 1.5px solid var(--color-secondary);
        border-radius: var(--radius-md);
        transition: var(--transition);
        text-decoration: none;
    }
    .mobile-topbar .mobile-cta a:hover {
        background: var(--color-secondary);
        color: #fff;
    }

    /* ===== Mobile Menu Overlay ===== */
    .mobile-menu-overlay {
        display: none;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(26, 31, 43, 0.98);
        z-index: 1050;
        padding: 24px 16px;
        overflow-y: auto;
        flex-direction: column;
    }
    .mobile-menu-overlay.open { display: flex; }
    .mobile-menu-overlay .mm-list li a {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 14px 0;
        font-size: 18px;
        font-weight: 500;
        color: #E8ECF1;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        text-decoration: none;
        transition: var(--transition);
    }
    .mobile-menu-overlay .mm-list li a:hover { color: var(--color-secondary); }
    .mobile-menu-overlay .mm-list li a i { width: 24px; color: #9CA3AF; }
    .mobile-menu-overlay .mm-list li a.active { color: var(--color-secondary); }
    .mobile-menu-overlay .mm-list li a.active i { color: var(--color-secondary); }
    .mobile-menu-overlay .mm-footer {
        margin-top: 40px;
        padding-top: 24px;
        border-top: 1px solid rgba(255,255,255,0.06);
    }
    .mobile-menu-overlay .mm-footer p {
        font-size: 13px;
        color: #6B7280;
        margin-bottom: 6px;
    }

    /* ===== Main Content Area ===== */
    .main-content {
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        padding: 0 40px 0 40px;
        max-width: var(--content-max);
        margin: 0 auto;
        width: 100%;
    }

    /* ===== Article Page ===== */
    .article-page { padding: 40px 0 60px; flex: 1; }
    .article-breadcrumb {
        font-size: 13px;
        color: var(--color-text-muted);
        margin-bottom: 24px;
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        align-items: center;
    }
    .article-breadcrumb a { color: var(--color-text-muted); }
    .article-breadcrumb a:hover { color: var(--color-secondary); }
    .article-breadcrumb .sep { color: #D1D5DB; margin: 0 4px; }
    .article-breadcrumb .current { color: var(--color-text-heading); font-weight: 500; }
    .article-header {
        margin-bottom: 32px;
        padding-bottom: 24px;
        border-bottom: 1px solid var(--color-border);
    }
    .article-header h1 {
        font-size: 36px;
        line-height: 1.3;
        font-weight: 700;
        color: var(--color-text-heading);
        margin-bottom: 16px;
    }
    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 16px;
        align-items: center;
        font-size: 14px;
        color: var(--color-text-muted);
    }
    .article-meta .date { display: flex; align-items: center; gap: 6px; }
    .article-meta .date i { font-size: 13px; color: #9CA3AF; }
    .article-meta .category-tag {
        display: inline-block;
        padding: 3px 12px;
        background: #E5E7EB;
        color: #4B5563;
        border-radius: var(--radius-sm);
        font-size: 12px;
        font-weight: 500;
        letter-spacing: 0.3px;
    }
    .article-body {
        max-width: var(--article-max);
        font-size: 16px;
        line-height: 1.8;
        color: var(--color-text-body);
        margin-bottom: 48px;
    }
    .article-body h2 { font-size: 24px; font-weight: 700; margin: 36px 0 16px; color: var(--color-text-heading); }
    .article-body h3 { font-size: 20px; font-weight: 600; margin: 28px 0 12px; color: var(--color-text-heading); }
    .article-body p { margin-bottom: 1.2rem; }
    .article-body ul, .article-body ol { margin-bottom: 1.2rem; padding-left: 24px; list-style: disc; }
    .article-body ol { list-style: decimal; }
    .article-body li { margin-bottom: 6px; }
    .article-body blockquote {
        border-left: 4px solid var(--color-secondary);
        padding: 16px 20px;
        margin: 24px 0;
        background: #F3F4F6;
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        color: #4B5563;
        font-style: normal;
    }
    .article-body blockquote p:last-child { margin-bottom: 0; }
    .article-body img { border-radius: var(--radius-md); margin: 24px 0; max-width: 100%; }
    .article-body code {
        background: #F3F4F6;
        padding: 2px 8px;
        border-radius: var(--radius-sm);
        font-size: 14px;
        color: #E11D48;
    }
    .article-body pre {
        background: #F3F4F6;
        padding: 20px;
        border-radius: var(--radius-md);
        overflow-x: auto;
        margin: 24px 0;
        border: 1px solid var(--color-border);
    }
    .article-body pre code { background: transparent; padding: 0; color: inherit; }

    /* ===== Article Not Found ===== */
    .article-not-found {
        text-align: center;
        padding: 80px 20px;
        max-width: var(--article-max);
        margin: 0 auto;
    }
    .article-not-found .nf-icon {
        font-size: 64px;
        color: #D1D5DB;
        margin-bottom: 24px;
    }
    .article-not-found h2 {
        font-size: 28px;
        color: var(--color-text-heading);
        margin-bottom: 12px;
    }
    .article-not-found p {
        font-size: 16px;
        color: var(--color-text-muted);
        margin-bottom: 24px;
    }
    .article-not-found .back-home {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 12px 32px;
        background: var(--color-secondary);
        color: #fff;
        border-radius: var(--radius-md);
        font-weight: 600;
        font-size: 16px;
        transition: var(--transition);
        text-decoration: none;
    }
    .article-not-found .back-home:hover {
        background: #3d9b6a;
        box-shadow: var(--shadow-btn);
        text-decoration: none;
    }

    /* ===== Related Articles ===== */
    .related-section {
        max-width: var(--article-max);
        padding-top: 40px;
        border-top: 1px solid var(--color-border);
        margin-bottom: 40px;
    }
    .related-section h2 {
        font-size: 24px;
        font-weight: 700;
        color: var(--color-text-heading);
        margin-bottom: 24px;
    }
    .related-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .related-card {
        background: var(--color-card);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-card);
        overflow: hidden;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }
    .related-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-4px);
    }
    .related-card .rc-img {
        aspect-ratio: 16 / 9;
        background: var(--color-border);
        overflow: hidden;
    }
    .related-card .rc-img img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        border-radius: 0;
    }
    .related-card .rc-body {
        padding: 20px 20px 24px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .related-card .rc-body h4 {
        font-size: 16px;
        font-weight: 600;
        color: var(--color-text-heading);
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .related-card .rc-body h4 a { color: inherit; text-decoration: none; }
    .related-card .rc-body h4 a:hover { color: var(--color-secondary); }
    .related-card .rc-body p {
        font-size: 13px;
        color: var(--color-text-muted);
        line-height: 1.5;
        margin-bottom: 12px;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .related-card .rc-body .rc-meta {
        display: flex;
        align-items: center;
        justify-content: space-between;
        font-size: 12px;
        color: var(--color-text-placeholder);
    }
    .related-card .rc-body .rc-meta .rc-tag {
        padding: 2px 10px;
        background: #E5E7EB;
        color: #4B5563;
        border-radius: var(--radius-sm);
        font-size: 11px;
        font-weight: 500;
    }

    /* ===== Back Link ===== */
    .back-link {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 15px;
        font-weight: 500;
        color: var(--color-secondary);
        text-decoration: none;
        padding: 8px 0;
        transition: var(--transition);
    }
    .back-link:hover { text-decoration: underline; color: #3d9b6a; }
    .back-link i { font-size: 14px; }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--color-primary);
        padding: 48px 0 24px;
        margin-top: auto;
        flex-shrink: 0;
    }
    .footer-inner {
        max-width: var(--content-max);
        margin: 0 auto;
        padding: 0 40px;
    }
    .footer-grid {
        display: grid;
        grid-template-columns: 2fr 1fr 1fr;
        gap: 40px;
        padding-bottom: 32px;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand .logo-text {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 700;
        color: #E8ECF1;
        margin-bottom: 16px;
    }
    .footer-brand .logo-text .logo-icon {
        width: 32px;
        height: 32px;
        background: var(--color-secondary);
        border-radius: var(--radius-sm);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-weight: 700;
        font-size: 14px;
    }
    .footer-brand p {
        font-size: 14px;
        color: #9CA3AF;
        line-height: 1.7;
        max-width: 360px;
    }
    .footer-col h5 {
        font-size: 14px;
        font-weight: 600;
        color: #E8ECF1;
        margin-bottom: 16px;
    }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a {
        font-size: 13px;
        color: #6B7280;
        transition: var(--transition);
        text-decoration: none;
    }
    .footer-col ul li a:hover { color: var(--color-secondary); }
    .footer-bottom {
        text-align: center;
        padding-top: 24px;
        font-size: 12px;
        color: #6B7280;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1023px) {
        body { padding-left: 0; padding-top: 56px; }
        .side-nav { display: none; }
        .mobile-topbar { display: flex; }
        .main-content { padding: 0 24px; }
        .footer-inner { padding: 0 24px; }
        .article-header h1 { font-size: 28px; }
        .related-grid { grid-template-columns: repeat(2, 1fr); }
        .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 767px) {
        .main-content { padding: 0 16px; }
        .footer-inner { padding: 0 16px; }
        .article-page { padding: 24px 0 40px; }
        .article-header h1 { font-size: 24px; }
        .article-body { font-size: 15px; line-height: 1.75; }
        .article-body h2 { font-size: 20px; }
        .article-body h3 { font-size: 18px; }
        .related-grid { grid-template-columns: 1fr; gap: 16px; }
        .footer-grid { grid-template-columns: 1fr; gap: 32px; }
        .footer-brand p { max-width: 100%; }
        .article-meta { flex-direction: column; gap: 8px; align-items: flex-start; }
        .container { padding: 0 16px; }
    }
    @media (min-width: 1024px) and (max-width: 1280px) {
        .main-content { padding: 0 32px; }
        .footer-inner { padding: 0 32px; }
    }

    /* ===== Utility ===== */
    .text-center { text-align: center; }
    .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --color-primary: #1A1F2B;
            --color-secondary: #4CAF7C;
            --color-accent: #F97316;
            --color-bg: #F8FAFC;
            --color-card: #FFFFFF;
            --color-text-heading: #1F2937;
            --color-text-body: #374151;
            --color-text-muted: #6B7280;
            --color-text-placeholder: #9CA3AF;
            --color-border: #E5E7EB;
            --color-nav-hover: #2C3344;
            --color-active-bar: #4CAF7C;
            --font-base: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --shadow-card: 0 4px 12px rgba(0,0,0,0.06);
            --shadow-card-hover: 0 12px 28px rgba(0,0,0,0.12);
            --shadow-button: 0 8px 20px rgba(76,175,124,0.4);
            --radius-small: 4px;
            --radius-card: 16px;
            --radius-button: 8px;
            --transition-base: 0.2s ease;
            --nav-width: 240px;
            --content-max: 1280px;
            --gap-section: 80px;
            --gap-section-mobile: 48px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-base);
            background: var(--color-bg);
            color: var(--color-text-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--color-secondary); text-decoration: none; transition: var(--transition-base); }
        a:hover { text-decoration: underline; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-card); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--color-text-heading); font-weight: 700; line-height: 1.3; }
        .container { max-width: var(--content-max); margin: 0 auto; padding: 0 40px; }
        .section-title { text-align: center; margin-bottom: 40px; }
        .section-title h2 { font-size: 32px; line-height: 40px; font-weight: 700; color: var(--color-text-heading); }
        .section-title p { font-size: 16px; color: var(--color-text-muted); margin-top: 12px; max-width: 680px; margin-left: auto; margin-right: auto; }

        /* ===== Layout: Side Nav + Content ===== */
        .app-wrapper { display: flex; min-height: 100vh; }
        .side-nav {
            position: fixed; top: 0; left: 0; width: var(--nav-width); height: 100vh;
            background: var(--color-primary); color: #E8ECF1;
            display: flex; flex-direction: column; z-index: 1000;
            transition: transform var(--transition-base);
        }
        .side-nav .brand {
            height: 80px; display: flex; align-items: center; padding: 0 20px; gap: 12px; border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .side-nav .brand .logo-icon {
            width: 32px; height: 32px; background: var(--color-secondary); border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 700; color: #fff; letter-spacing: 1px;
        }
        .side-nav .brand .logo-text { font-size: 18px; font-weight: 600; color: #fff; letter-spacing: 1px; }
        .side-nav .nav-list { flex: 1; padding: 20px 0; overflow-y: auto; }
        .side-nav .nav-list li { margin: 0; }
        .side-nav .nav-list a {
            display: flex; align-items: center; gap: 12px;
            padding: 12px 20px; font-size: 14px; font-weight: 500; color: #E8ECF1;
            border-left: 4px solid transparent; transition: var(--transition-base);
        }
        .side-nav .nav-list a:hover { background: var(--color-nav-hover); text-decoration: none; }
        .side-nav .nav-list a.active { border-left-color: var(--color-active-bar); background: rgba(76,175,124,0.12); color: #fff; }
        .side-nav .nav-list a i { width: 20px; text-align: center; font-size: 16px; }
        .side-nav .nav-footer {
            padding: 20px; border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 12px; color: #6B7280; line-height: 1.8;
        }
        .side-nav .nav-footer p { margin: 0; }
        .main-content { margin-left: var(--nav-width); flex: 1; min-height: 100vh; padding: 40px; max-width: 100%; }

        /* ===== Mobile Header ===== */
        .mobile-header {
            display: none; position: fixed; top: 0; left: 0; right: 0; height: 56px;
            background: var(--color-primary); z-index: 1100;
            align-items: center; justify-content: center; padding: 0 16px;
        }
        .mobile-header .hamburger {
            position: absolute; left: 16px; top: 50%; transform: translateY(-50%);
            background: none; border: none; cursor: pointer; padding: 8px; color: #E8ECF1; font-size: 20px;
        }
        .mobile-header .mobile-brand { font-size: 18px; font-weight: 600; color: #fff; letter-spacing: 1px; display: flex; align-items: center; gap: 8px; }
        .mobile-header .mobile-brand .logo-icon {
            width: 28px; height: 28px; background: var(--color-secondary); border-radius: 6px;
            display: flex; align-items: center; justify-content: center;
            font-size: 12px; font-weight: 700; color: #fff;
        }
        .mobile-overlay {
            display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(26,31,43,0.97); z-index: 1050;
            flex-direction: column; align-items: center; justify-content: center; gap: 24px;
        }
        .mobile-overlay.open { display: flex; }
        .mobile-overlay a {
            font-size: 18px; line-height: 48px; color: #E8ECF1; font-weight: 500;
            border-left: 4px solid transparent; padding-left: 16px; transition: var(--transition-base);
        }
        .mobile-overlay a.active { border-left-color: var(--color-active-bar); color: #fff; }
        .mobile-overlay .close-btn {
            position: absolute; top: 16px; right: 16px; background: none; border: none; color: #E8ECF1; font-size: 24px; cursor: pointer;
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative; min-height: 60vh; display: flex; align-items: center; justify-content: center;
            background: linear-gradient(135deg, rgba(26,31,43,0.88) 0%, rgba(26,31,43,0.75) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            border-radius: var(--radius-card); padding: 80px 40px; margin-bottom: var(--gap-section); overflow: hidden;
        }
        .hero-section .hero-content { text-align: center; max-width: 800px; position: relative; z-index: 2; }
        .hero-section h1 {
            font-size: 48px; line-height: 56px; font-weight: 700; color: #fff; margin-bottom: 20px;
            text-shadow: 0 2px 12px rgba(0,0,0,0.3);
        }
        .hero-section .hero-sub {
            font-size: 20px; line-height: 30px; color: #D1D5DB; margin-bottom: 32px; font-weight: 400;
        }
        .hero-section .hero-cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero-section .btn-primary {
            background: var(--color-secondary); color: #fff; border: none; padding: 14px 40px;
            font-size: 16px; font-weight: 600; border-radius: var(--radius-button); cursor: pointer;
            transition: var(--transition-base); box-shadow: var(--shadow-button);
        }
        .hero-section .btn-primary:hover { background: #3d9c6a; box-shadow: 0 10px 28px rgba(76,175,124,0.5); transform: translateY(-2px); }
        .hero-section .btn-secondary {
            background: transparent; color: #fff; border: 2px solid var(--color-secondary);
            padding: 12px 40px; font-size: 16px; font-weight: 600; border-radius: var(--radius-button); cursor: pointer;
            transition: var(--transition-base);
        }
        .hero-section .btn-secondary:hover { background: rgba(76,175,124,0.15); transform: translateY(-2px); }

        /* ===== Section spacing ===== */
        .section-block { margin-bottom: var(--gap-section); }
        .section-block:last-child { margin-bottom: 0; }

        /* ===== Capabilities Grid ===== */
        .capabilities-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .cap-card {
            background: var(--color-card); border-radius: var(--radius-card); padding: 32px 24px;
            box-shadow: var(--shadow-card); transition: var(--transition-base); text-align: center;
        }
        .cap-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
        .cap-card .icon { font-size: 36px; color: var(--color-secondary); margin-bottom: 16px; }
        .cap-card h3 { font-size: 18px; font-weight: 600; color: var(--color-text-heading); margin-bottom: 12px; }
        .cap-card p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; }

        /* ===== Scenarios Grid ===== */
        .scenarios-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .scenario-card {
            background: var(--color-card); border-radius: var(--radius-card); overflow: hidden;
            box-shadow: var(--shadow-card); transition: var(--transition-base);
        }
        .scenario-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
        .scenario-card .card-img { height: 200px; background: var(--color-border); overflow: hidden; }
        .scenario-card .card-img img { width: 100%; height: 100%; object-fit: cover; border-radius: 0; }
        .scenario-card .card-body { padding: 24px; }
        .scenario-card .card-body h3 { font-size: 18px; font-weight: 600; color: var(--color-text-heading); margin-bottom: 8px; }
        .scenario-card .card-body p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; }
        .scenario-card .card-body .tag {
            display: inline-block; background: rgba(76,175,124,0.12); color: var(--color-secondary);
            font-size: 12px; padding: 2px 12px; border-radius: 20px; margin-bottom: 10px; font-weight: 500;
        }

        /* ===== Advantages ===== */
        .advantages-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .advantage-item {
            display: flex; gap: 20px; background: var(--color-card); padding: 28px 24px;
            border-radius: var(--radius-card); box-shadow: var(--shadow-card); transition: var(--transition-base);
            align-items: flex-start;
        }
        .advantage-item:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); }
        .advantage-item .num {
            width: 48px; height: 48px; flex-shrink: 0; border-radius: 12px;
            background: rgba(76,175,124,0.12); color: var(--color-secondary);
            display: flex; align-items: center; justify-content: center;
            font-size: 20px; font-weight: 700;
        }
        .advantage-item .info h4 { font-size: 16px; font-weight: 600; color: var(--color-text-heading); margin-bottom: 6px; }
        .advantage-item .info p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; margin: 0; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--color-card); border-radius: var(--radius-card); padding: 40px; box-shadow: var(--shadow-card); }
        .faq-section .section-title { margin-bottom: 32px; }
        .accordion-item { border-bottom: 1px solid var(--color-border); }
        .accordion-item:last-child { border-bottom: none; }
        .accordion-title {
            display: flex; justify-content: space-between; align-items: center;
            padding: 18px 0; font-size: 16px; font-weight: 500; color: var(--color-text-heading);
            cursor: pointer; transition: var(--transition-base); background: none; border: none; width: 100%; text-align: left;
        }
        .accordion-title:hover { color: var(--color-secondary); }
        .accordion-title .icon { font-size: 14px; color: var(--color-text-muted); transition: var(--transition-base); }
        .accordion-content {
            max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 0; font-size: 14px; color: var(--color-text-muted); line-height: 1.8;
        }
        .accordion-content.open { max-height: 300px; padding: 0 0 18px 0; }
        .faq-more { text-align: center; margin-top: 24px; font-size: 14px; }
        .faq-more a { color: var(--color-secondary); font-weight: 500; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary); border-radius: var(--radius-card); padding: 64px 40px;
            text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
            background: radial-gradient(circle at 30% 50%, rgba(76,175,124,0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section h2 { font-size: 36px; line-height: 44px; font-weight: 700; color: #fff; margin-bottom: 16px; position: relative; z-index: 1; }
        .cta-section p { font-size: 16px; color: #9CA3AF; margin-bottom: 32px; position: relative; z-index: 1; }
        .cta-section .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }
        .cta-section .btn-primary {
            background: var(--color-secondary); color: #fff; border: none; padding: 14px 40px;
            font-size: 16px; font-weight: 600; border-radius: var(--radius-button); cursor: pointer;
            transition: var(--transition-base); box-shadow: var(--shadow-button);
        }
        .cta-section .btn-primary:hover { background: #3d9c6a; box-shadow: 0 10px 28px rgba(76,175,124,0.5); transform: translateY(-2px); }
        .cta-section .btn-outline {
            background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.3);
            padding: 12px 40px; font-size: 16px; font-weight: 600; border-radius: var(--radius-button); cursor: pointer;
            transition: var(--transition-base);
        }
        .cta-section .btn-outline:hover { border-color: var(--color-secondary); color: var(--color-secondary); background: rgba(76,175,124,0.08); }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-primary); border-radius: var(--radius-card); padding: 48px 40px 24px;
            margin-top: var(--gap-section);
        }
        .footer-inner { max-width: var(--content-max); margin: 0 auto; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .logo-text { font-size: 20px; font-weight: 600; color: #fff; display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
        .footer-brand .logo-text .logo-icon {
            width: 32px; height: 32px; background: var(--color-secondary); border-radius: 8px;
            display: flex; align-items: center; justify-content: center;
            font-size: 14px; font-weight: 700; color: #fff;
        }
        .footer-brand p { font-size: 14px; color: #6B7280; line-height: 1.8; max-width: 400px; }
        .footer-col h5 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { font-size: 13px; color: #6B7280; transition: var(--transition-base); }
        .footer-col ul li a:hover { color: var(--color-secondary); text-decoration: none; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; text-align: center; font-size: 12px; color: #6B7280; }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            .side-nav { transform: translateX(-100%); }
            .side-nav.open { transform: translateX(0); }
            .main-content { margin-left: 0; padding: 24px; padding-top: 72px; }
            .mobile-header { display: flex; }
            .container { padding: 0 24px; }
            .capabilities-grid { grid-template-columns: repeat(2, 1fr); }
            .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
            .advantages-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .hero-section { min-height: 50vh; padding: 60px 24px; }
            .hero-section h1 { font-size: 36px; line-height: 44px; }
            .hero-section .hero-sub { font-size: 18px; }
        }
        @media (max-width: 767px) {
            .main-content { padding: 16px; padding-top: 72px; }
            .container { padding: 0 16px; }
            .hero-section { min-height: 40vh; padding: 40px 20px; border-radius: 12px; }
            .hero-section h1 { font-size: 28px; line-height: 36px; }
            .hero-section .hero-sub { font-size: 16px; line-height: 24px; }
            .hero-section .btn-primary, .hero-section .btn-secondary { width: 100%; text-align: center; }
            .section-title h2 { font-size: 24px; line-height: 32px; }
            .capabilities-grid { grid-template-columns: 1fr; }
            .scenarios-grid { grid-template-columns: 1fr; }
            .advantages-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .cta-section { padding: 40px 20px; }
            .cta-section h2 { font-size: 24px; line-height: 32px; }
            .cta-section .btn-primary, .cta-section .btn-outline { width: 100%; text-align: center; }
            .faq-section { padding: 24px; }
            .site-footer { padding: 32px 20px 20px; }
            .section-block { margin-bottom: var(--gap-section-mobile); }
            .advantage-item { flex-direction: column; }
            .hero-section .hero-cta { flex-direction: column; }
        }
        @media (max-width: 520px) {
            .hero-section h1 { font-size: 24px; line-height: 32px; }
            .hero-section .hero-sub { font-size: 14px; line-height: 22px; }
            .scenario-card .card-img { height: 160px; }
        }

        /* ===== Focus & Accessibility ===== */
        a:focus-visible, button:focus-visible, .accordion-title:focus-visible {
            outline: 2px solid var(--color-secondary); outline-offset: 2px; border-radius: 4px;
        }
        .btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(76,175,124,0.3); }
        .btn-secondary:active { transform: translateY(0); }
        .btn-outline:active { transform: translateY(0); }

        /* ===== Image placeholder fallback ===== */
        .img-placeholder {
            background: var(--color-border); display: flex; align-items: center; justify-content: center;
            font-size: 24px; color: var(--color-text-placeholder); font-weight: 600;
            min-height: 200px; border-radius: var(--radius-card);
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .gap-16 { gap: 16px; }